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Table of Contents
Foreword
Preface
Glossary

Chapter 4: Climate

4.4: The Souris Valley West of Lauder in Autumn and Spring

The two photographs show the same stretch of the Souris River in autumn (figure 4.4a), and in spring (figure 4.4b). In the former the course of the northeast flowing Souris River 1 can be seen, meandering at first, followed by a straight stretch. A weir is located 2 where the river changes from meandering to straight. Scars indicating former river positions can be seen 3 but only one stretch 4 is occupied by water. In the spring photo (figure 4.4b) all the abandoned channels are filled with water 5; water also occupies the lowland between meander scrolls 6. This comparison illustrates the usefulness of interpreting photos taken at different seasons.

Also the photo in figure 4.4b was taken several years before photo in figure 4.4a so changes in the landscape can be observed:

1)  a drainage ditch 7 has been constructed on figure 4.4a.

2)  several dugouts 8 have been constructed on figure 4.4a.

3)  gravel roads have been constructed 9 or improved 10 on figure 4.4a.

Note also, the orientation of the photo in 4.4a is unusual in that the sides are not east/west and north/south. It is part of a sequence of photos taken along the course of the Souris River resulting in photo sides which trend at an angle to the cardinal points.

Figure 4.4.a: The Souris Valley West of Lauder in Autumn

Figure 4.4.a: The Souris Valley West of Lauder in Autumn

Figure 4.4a

Vertical air photograph: A20811-36

Flight height: 10,300 feet a.s.l.; lens focal length: 6 inches

Date: September 28, 1968

Scale: 1:17,800 (approx.)

Location: Township 5; Range 25 WI

Map sheets: 1:250,000 62F Virden

1:50,000 62F/7 Hartney



Figure 4.4.b: The Souris Valley West of Lauder in Spring

Figure 4.4.b: The Souris Valley West of Lauder in Spring

Figure 4.4b

Vertical air photo: A11042-119

Flight height: 9,520 feet; lens focal length: 6 inches

Date: May 19, 1947

Scale: 1:16,240

Location: Township 5, Range 25WI

Map sheets: 1:250,000 62F Virden

1:50,000 62F/7 Hartney